Improvement in feed-water heaters for boilers



r ZSheets-Sheet 1. A. T. DENISO-N.

` lFELIJ-WATER HEATER-S FOR'BOILERS. l

N 189,847 v Patented Apr'1124, 1877.

Ny PETERS. PHOTO-UTHOGRAFHER, WASHXNGTON. n C.

UNITED STATES PATENT CEEICE.

ADNA T. DENISON, OF MECHANICS FALLS, MAINE.

' IMPROVEMENT IN FEED-WATER HEATERS FOR BILERS.

' Specification forming part of Letters Patent No. 189,847, dated April24, 18.77; application tiled 4 July 7, 1876.

.To all whom it may concern:

Be it known that I, ADNA T. DENrsoN, of Mechanics Falls, Maine, haveinvented a new i and useful Improvement in Apparatus for y for heatingthe supply-water for steam-boilers that is formed of a pipe or pipes,through which the supply-Water is conveyed tothe boiler, heated by thesame tire by which the water in the boiler is heated; and consists ofthe peculiar heating-chambers hereinafter described, formed in the wallsof the brick-work B, and combnstionchamher of the boiler, in which thesaid pipes are located, the heat from the tire reaching said pipesthrough apertures Iliade in the wall dividing the said tire-place andcombustion-chamber from the said heating-chamber.

A represents a common steam-cylinder boiler, set in brick-Work B. U isthe lire-place, the combustion-chamber extending along underneath theboiler, in the usual way. D and Dl represent end views ot' the chamberformed in the Walls of the brick-Work. This heating-chamber extends theentire length of the sides of the brick-work B, and across its ends,inclosing a space about equal in extent vertically to that of thelire-place and combustion chamber. Through their inner Walls a c areapertures. (Shown by the small circles ein Fig. 4, and at e in Fig, 3.)These apertures permit the ready transmission of heat from thelire-place and combastion-chamber to the heating-chamber D D. Withinthis chamber D Dl is placed a continuous pipe, or a series of pipes, E,through which the supply-Water for the boiler is to be forced. In thedrawing a single pipe is represented, which enters the said chamber atthe front end, on one side, as represented by f, Figs. 1 and It runs Aalong near the bottom of the chamber D to the rear end; then across saidend, and back through and near the bottom of the chamber D to its frontend; then, bending back upon itself, runs around the stack to itsstartingpoint; then, again bending, returns to the front end of sidechamber D, and out of the brick\vorl; B, as represented at c. Waterforced through this pipe will thuspass three times the entire length ofthe sides and end of the chamber. A greater or less numberof bends maybe made, as may be thought desirable.

rlhe walls or 'partitions c a', between the cham ber and lire-place, maybe of brick, built into and forming part of the general Wall of thelireplaee; or they may be built up independently after the pipe is putinplace; or, again, they may consist of heavy ironplates, anchored intothe wall, so as to be conveniently removed. Ot' whatever materialformed, it is essential that these partition-walls should be pierced bya number of apertures of suitable size to permit the heat from thelire-place to penetrate freely'iuto the chamber, but, at the same time,not so large but that the saidv pipe shall be protected in theheating-chamber from disturbance or injury. The pipe is to be connectedat one end with a force-pump, or other means of forcing water throughit, and at the opposite end with the boiler.

It is obvious that this construction and arrangement of heating chambersand pipe will secure the heating of the supply-Water to any desireddegree by the same fire by which the water in the boiler is heated,Without exposing the pipes to injury, and without cumbering thetire-place With their presence in it.

Water-heaters have been placed in cham bers formed in the Walls of thetire-places ot' steam-boilers, through which the products of combustionpass on their way to the smoke. stack, the said chamber thusconstituting, in fact, a part of the flue. My claim is restricted to thespecial construction and arrangement shown and described, wherein theheater is located in chambers or a chamber formed in the walls ot' thefireplace outside, and forming no part of, the tlue, and communieatingwith `the lire-place or liuc only byapertures in the division-wallbetween the said chamber or chambers and the {ire-place or tine.

The special advantages of this location and arrangement of the pipes forheating the supply-Water for steam-boilers are, that While they aresubmitted to the action of the same tire by which the steam is formed inthe boiler, they are, at the same time, not exposed to the direct heatof said re, by which they would be more rapidlyoxidized and destroyed.They are also out of the Way, and not eX- posed to accidental injury, asthey would be if not inclosed in the chamber described. This arrangementalso secures the heating ot' the supply-Water very economically anduniformly.

What I claim as my invention, and desire to secure by Letters Patent,is-

The combination of' a steam boiler, lireplace, and Water-heater, thesaid heater being located in a chamber in the sides or ends of thebrick-Work setting, said chamber forming no partot' the smokeflue, andcommunicating with the rc place by apertures through the division-Wall,separating the said chamber from the fire-place, all substantially asand for the purpose described; A Witness my hand this 30th day of June,1876.

ADNA T. DENISON.

Witnesses:

G. L. REED, C. M. CRANE.

